Wave Mechanics NPD Engineer Interview Questions and Answers

Q1. How to choose mosfet
Ans. 
Choose a MOSFET based on voltage, current, power dissipation, switching speed, and package type.
• Consider voltage and current requirements

• Look at power dissipation and thermal considerations

• Evaluate switching speed needed for the application

• Choose the appropriate package type for mounting and heat dissipation

• Check for additional features like built-in protection circuits

• Example: For high power applications, choose a MOS
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It is like gate exam paper more of electronics questions than programming languages. Here the programming language is c and embedded

Q1. Basic level questions on c but indepth discussion on the academic projects.
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Q2. Explain Compilation stages
Ans. 
Compilation stages involve preprocessing, compilation, assembly, linking, and loading.
• Preprocessing: Includes expanding macros, handling conditional compilation, and file inclusion.

• Compilation: Translates source code into assembly code or machine code.

• Assembly: Converts assembly code into object code.

• Linking: Combines multiple object files and libraries into a single executable.

• Loading: Loads the executable into memory
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Q3. Logics on bit wise operators
Ans. 
Bitwise operators are used to perform operations at the bit level on binary numbers.
• Bitwise AND (&) - sets a bit to 1 only if both input bits are 1

• Bitwise OR (|) - sets a bit to 1 if either input bit is 1

• Bitwise XOR (^) - sets a bit to 1 if the input bits are different

• Bitwise NOT (~) - inverts all the bits

• Left shift (<<) - shifts the bits to the left by a specified number of positions

• Right shift (>>) - shifts the bits
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Q4. Understanding of pointers
Ans. 
Pointers are variables that store memory addresses of other variables in programming languages like C and C++.
• Pointers are used to store memory addresses of variables.

• They allow direct manipulation of memory locations.

• Pointers can be used to pass variables by reference.

• Example: int *ptr; ptr = # *ptr = 10; // num now equals 10
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Q5. Volatile and non volatile keywords
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Q1. Differentiate between RISC and CISC
Ans. 
RISC stands for Reduced Instruction Set Computing and CISC stands for Complex Instruction Set Computing.
• RISC processors have a smaller set of simple instructions, while CISC processors have a larger set of complex instructions.

• RISC processors typically execute instructions in one clock cycle, while CISC processors may require multiple clock cycles.

• RISC processors rely on optimizing compilers for performance, while CISC...read more
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Q2. Define and differentiate interpreter and compiler
Ans. 
Interpreter translates code line by line while compiler translates entire code at once.
• Interpreter: translates code line by line, slower execution, easier debugging (e.g. Python)

• Compiler: translates entire code at once, faster execution, harder debugging (e.g. C++)
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Dsa + JavaScript related questions and outputs

Js related coding + easy dsa

Q1. Mostly about the projects you did earlier
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Q2. What do you focus on learning in future
Ans. 
I focus on learning new programming languages, technologies, and best practices to stay current in the industry.
• Learning new programming languages such as Python or Go

• Exploring emerging technologies like blockchain or machine learning

• Staying updated on best practices in software development such as Agile or DevOps

• Improving problem-solving skills through coding challenges and projects
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First levelWe can choose among different layer, webapi, UI and they asked to write sample program in 90 mins. Second level was really bad though. Will be asked to write code basics to advanced.

Q1. Second level was also coding.
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Q1. Diifference btw polymorphism
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Q2. Opps concept in python
Ans. 
Object-oriented programming concepts in Python focus on classes, objects, inheritance, and polymorphism.
• Classes are blueprints for creating objects with attributes and methods.

• Objects are instances of classes that can store data and perform actions.

• Inheritance allows classes to inherit attributes and methods from other classes.

• Polymorphism enables objects to be treated as instances of their parent class or their own cl
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